Our nipple patch kit allows the user to relocate the bag nipple to a new location on either side of a vacuum bag. This is commonly done when one side or end of the bag gets worn from use giving the bag a new life. A nipple patch comes with one nipple heat welded to a 3" diameter patch for easy attachment, a tube of glue and a piece of bag material for patching the old nipple hole. Specify vinyl or polyurethane when ordering.